摘要
随着新能源的逐渐规模化并网,为了确保电网安全稳定运行,提高传统火电机组的调峰能力和变负荷速率成为发电行业关注的重点。本文分析了某超超临界1 000 MW二次再热汽轮发电机组的5级低压加热器回热系统特性,建立凝结水变负荷的稳态及动态模型,仿真评估凝结水节流变负荷技术的应用效果。结果表明:机组理论凝结水变负荷能力与实际系统仿真试验基本一致,可快速释放的总蓄热量为2 789~4 605 MJ,是提升机组变负荷初期速率的有效手段;二次再热机组的凝结水节流变负荷能力及机组节能效果比常规亚临界汽包炉更有优势,未来具有较强的研究意义及实用价值。
Due to the rapid increase of integration of new energy sources, much attention has been paid to the improvement of peak load regulating and load regulation rate to enhance the safety and stability of the power grid. In this paper, the characteristics of regenerative system with five-stage low pressure heaters in a 1 000 MW ultra supercritical double-reheat unit were analyzed, both the stable and dynamic models of the regenerative system were developed. The results show that, the condensate load adjustment technology has been proposed to further exploit the thermal energy from low-pressure heating system. The theoretical condensate load adjustment ability of the unit agrees with the actual simulation test result. The total heat storage of 2 789＂~4 605 MJ contributes to the quick adjustment of the unit load. Meanwhile, compared with the conventional subcritical units, the double-reheat units applying the condensate throttling technology have more advantageous.
作者
侯玉婷
周俊波
高林
王林
周宇哲
HOU Yuting ZHOU Junbo GAO Lin WANG Lin ZHOU Yuzhe(Xi＇an Thermal Power Research Institute Co., Ltd., Xi＇an 710054, China)
出处
《热力发电》
CAS
北大核心
2017年第8期82-85,95,共5页
Thermal Power Generation
关键词
超超临界机组
二次再热
火电调峰
机组变负荷
凝结水节流
动态模型
蓄热量
响应时间
ultra supercritical unit, double-reheat, peak load regulation, unit load adjustment, condensate throttle, dynamic model, heat storage, response time
